What are the PCI mezzanine card (PMC) connectors used for on the PCI development board?

Description

The PMC connectors on the PCI development board are used for connecting multiple PCI-based applications on the same board.

Please refer to the APEX 20KE Documentation at the following URL: https://www.intel.com/content/www/us/en/programmable/support/literature/lit-apx.html